LJ
Lydia Johnson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Lydia Johnson across the 1920, 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 4-person household.
Age 43
b. ~1887
Female
Spouse
Born: Finland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Johnson |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Alien |
| Year of Immigration | 1906 |
| Age at First Marriage | 20 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Additional Details | |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1887 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Lydia | Age | Birth yr |
|---|---|---|---|---|
| John Johnson | Head | — | 43 | ~1887 |
| Lydia Johnson | Spouse | — | 43 | ~1887 |
| John Johnson | Son | — | 19 | ~1911 |
| Hedora Johnson | Daughter | — | 15 | ~1915 |
Census Appearances
1920
San Francisco, …
Spouse, age 36
San Francisco, California · implied b. ~1884 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1913 |
| Naturalization Status | Alien |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Housewife |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
San Francisco, …
Spouse, age 43
San Francisco, California · implied b. ~1887 — 4 household members
| Surname | Johnson |
| Given Name | Lydia |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Alien |
| Year of Immigration | 1906 |
| Age at First Marriage | 20 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
San-Francisco-County, California
Head, age 52
San-Francisco-County, California · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lina |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | Alien |
| Occupation | Hand Ironer |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Lydia Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Lydia Johnson
Spouse · 1930 · age 43 · b. ~1887 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
47 people indexed on this census page (ia:1930:californiacensus00reel198:0286)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clin Nett | 32 | Head | Salesman | North Dakota |
| 2 | Theodora Nett | 33 | Wife | Bookkeeper | Wisconsin |
| 3 | Eugene W. Nett | 16 | Nephew | — | Montana |
| 4 | Melvin R. Nett | 13 | Nephew | — | Montana |
| 5 | Louis Reubler | 34 | Head | Mechanic | California |
| 6 | May Reubler | 30 | Wife | — | California |
| 7 | Donald Reubler | 5 | Son | — | California |
| 8 | Mary Jansey | 55 | Mother-in-law | — | California |
| 9 | Ted Baubister | 65 | Head | Packer | Germany |
| 10 | Baubister | 54 | Wife | — | Germany |
| 11 | Donald Baubister | 30 | Son | Salesman | California |
| 12 | Wm Remikadt | 49 | Head | Manager | California |
| 13 | Marion Remikadt | 28 | Wife | — | California |
| 14 | Richard Remikadt | 8 | Son | — | California |
| 15 | Thomas Economy | 43 | Head | Broker | Greece |
| 16 | Mary Economy | 21 | Daughter | Stenographer | California |
| 17 | Thomas Economy | 16 | Son | — | California |
| 18 | Conrad E. Scheel | 33 | Head | Printer | California |
| 19 | Mabel M. Scheel | 30 | Wife | — | California |
| 20 | Richard King | 52 | Head | Superintendent | England |
| 21 | Ruth King | 47 | Wife | — | California |
| 22 | Mary King | 76 | Mother-in-law | — | New Brunswick |
| 23 | Wiley Roberts | 39 | Head | Pressman | Iowa |
| 24 | Meta O. Roberts | 31 | Wife | — | Germany |
| 25 | Delores O. Roberts | 11 | Daughter | — | Utah |
| 26 | Albert B. Michaels | 30 | Head | Clerk | New York |
| 27 | Alma M. Michaels | 62 | Mother | Housekeeper | Illinois |
| 28 | Leo Toley | 50 | Head | — | Iowa |
| 29 | Annie Toley | 52 | Wife | Inspector | Sweden |
| 30 | Leo Jr. Toley | 24 | Son | — | California |
| 31 | Patricia Toley | 21 | Daughter | — | California |
| 32 | John Johnson | 43 | Head | Painter | Finland |
| 33 | Lydia Johnson THIS PERSON | 43 | Wife | — | Finland |
| 34 | John Axel Johnson | 19 | Son | Painter | New York |
| 35 | Hedora Johnson | 15 | Daughter | Student | California |
| 36 | Thomas Richardson | 60 | Head | — | Georgia |
| 37 | Raymond Tost | 40 | Head | — | California |
| 38 | Claude Tost | 39 | Brother | Housewife | California |
| 39 | Roy Tost | 37 | Brother | Marine Engineer | California |
| 40 | Charles Welch | 57 | Head | Machinist | Maine |
| 41 | Ellen Welch | 50 | Wife | — | California |
| 42 | Edith M. Welch | 15 | Daughter | — | California |
| 43 | Walter Welch | 13 | Son | — | California |
| 44 | Louise Welch | 7 | Daughter | — | California |
| 45 | Ralf Claw | 30 | Head | Manager | Norway |
| 46 | Mildred Claw | 27 | Wife | — | New York |
| 47 | Donald Claw | 4 | Son | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)